Smoke-consumer.



W. KELLY.

SMOKE CONSUMER.

APPLICATION FILED NOV. 26. 1912.

1,088,540. Patented Jan.6,1914,

Wmwm/ 766M 3 COLUMBIA PLANOGRAPH CO WASHINGTON. D. c.

W. KELLY.

SMOKE CONSUMER.

APPLICATION FILED NOV. 26, 1912.

1,083,540., Patented Jan. 6, 1914, 2 SHEETS-*sHEET 2. g

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COLUMBIA PLANOGRAPH (10.. WASHINGTON, D. c.

UTTED STATES PATENT ornioa.

WILLIAM KELLY, OIE MEMPHIS, TENNESSEE.

SMOKE-CONSUMER.

1,os3,54o.

Specification of Letters Patent.

Original application filed August 3, 1912, Serial No. 713,077. Divided and this application filed. November To all whom it may concern:

Be it known that I, WILLIAM KELLY, a citizen of the United States, residing at Memphis, in the county of Shelby and State of Tennessee, have invented new and useful Improvements in Smoke- Consumers, of which the following is a specification.

This invention relates to smoke consumers for steam boilers and other furnaces, and the present application is a division of my prior application filed August 3,1912, Serial No. 713,077 and is directed particularly to the means disclosed therein for oxygenating the unconsumed gases and products of combustion.

The object of the present invention is to provide a smoke consuming device which may be connected with the furnace in a simple manner, which provides for the injection of steam into the fire box or combustion chamber at a proper angle and the siphoning of air which is injected with the steam to promote combustion, and which operates practically without noise or other objections.

The invention consists of the features of construction, combination and arrangement of parts hereinafter fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a front elevation of a steam boiler furnace embodying my invention. Fig. 2 is a the same. Fig. 3 is a horizontal section on the line 3-3 of Fig. 2. Fig. 4 is a sectional elevation through the automatic controlling part of the apparatus.

Referring to the drawings, 1 designates a furnace of any ordinary construction; 2 the ash pit; 3 the bridge wall; 4 the fire box or combustion chamber; 5 the smoke stack and 6 the fuel feed door in the front wall of the furnace, all of which parts may be constructed or arranged in the usual or preferred manner.

Extending across the front of the furnace is a manifold or air distributing pipe 7 provided at one side, at spaced intervals, with air inlet nozzles 8, and diametrically opposite said nozzles 8 with injection nozzles 9. The nozzles 9 fit within thimbles 10, which extend through the front wall and front plate or lining of the furnace and into the upper portion of the fire box or combustion chamber,

vertical longitudinal section of said thimbles and nozzles in- Serial No. 733,687.

clining at an inward and downward angle so as to project the entering jets of steam and air against the bridge wall at any point between the top of the grate and top of the bridge wall, so that such jets of air and steam will commingle with the rising gases and unconsumed products of combustion from the bed of fuel and thoroughly and effectually oxygenate the same for rapid combustion. By the provision of the thimbles 10, no special construction of front wall or lining plate is required, it being only necessary, for the application of the invention to any type of furnace, to set the thimbles in said wall and lining when the furnace is constructed or any time while the wall and lining are being repaired or replaced, thus enabling the device to be applied with a minimum expenditure of time, labor and cost. The use of thimbles is also advantageous in that they protect the nozzles 9 from the heat, so that the thimbles Will be the only parts of the attachment requiring renewal at more or less frequent intervals.

Extending longitudinally within the manifold or air distributing pipe is a steam conducting. pipe 11 provided with jet nozzles 12 which extend partially through the nozzles 9. These nozzles 12 are also arranged in alinement with the air inlet nozzles 8 and are of less diameter than the nozzles 9, and by arranging them to terminate inside of the ends of the said nozzles 9 as described, the issuing jets of steam are caused to form a partial vacuum in the pipe 7, whereby a siphonic action will be established to draw air in through the nozzles 8 and discharge jets or blasts of the same through the nozzles 9.

Extending parallel with the manifold 7 is an air supply pipe 7 closed at one end by a cap 7 and having its opposite or inlet end 7 extending straight or at any angle from the furnace out through the side wall of the furnace room or roof of the building to the exterior, or to any suitable point from which air is to be drawn. Preferably the inlet end of the pipe 7 has an enlarged or funnel-shaped extremity, and the body of said pipe is provided with sleeves 8 which slidably engage the nozzles 8. Air is thus supplied to the manifold or distributing pipe at points in line with the discharge nozzles 9, whereby a sound-dampening action is instituted to prevent hissing or other objectionable noise. The air flowing through the pipe 7 a is warmed to a certain extent on its passage and commingled with the steam at a suficiently high temperature to avoid the necessity of superheating the air, with a consequent loss of oxygen.

The pipe 11 communicates at one end with a steam supply pipe 13 leading from the boiler and within which is arranged a controlling valve 14; The stem 15 of this valve projects externally and is provided with a crank arm 16 connected with the vertical stretch 17 of a chain 18, the horizontal stretch 19 of which passes over guide pul leys 20 and 21 and is detachably connected at its free end to the fuel feed door 6. The end of the chain stretch 17 is connected with one end (the long arm) of a lever 22 pivotally connected intermediate of its length with a stem 23 carried by a diaphragm 24 arranged within a casing 25 from which rises a bracket 22 to which the lever is pivotally attached. The casing 25 is connected with an auxiliary supply or branch pipe 26 leading from the pipe 13, whereby steam may be supplied to said casing, so that the diaphragm will control the lever 22 and valve 14 for an automatic cut out action.

A second chain 27 is connected at its upper disk having a small feed opening 31 therein, which regulates the supply of steam from the main steam supply pipe 13 to the diaphragm casing 25. Also arranged in the pipe 26 is a regulating valve 32, which is disposed between said pipe 13 and the retarder 3'1 and which is manually adjust able to cooperate with the retarder in regulating the flow of steam to the diaphragm casing, in order to enable the steam to be fed to the casing in such manner as to vary the time period elapsing between the setting of the consuming device into action and the point when the steam within the diaphragm casing reaches a proper degree of pressure to flex said diaphragm and thus communicate upward motion to the lever 22 to close the valve 14, thereby throwing the apparatus out of operation. Leading from the pipe 26 between the casing 25 and retarder 31 is a relief pipe 33 provided with a controlling valve 34 having its stem 35 provided with a crank 36 connected with the chain 27 which pipe permits ofthe escape of steam from the pipe 26 before reaching the diaphragm chamber, by means of which the diaphragm chamber may be relieved of a greater or less degree of steam pressure and the steam permitted to escape therefrom to the atmosphere or into the combustion chamber, as described.

The valves 14' and 34 are connected by the chains with the fuel feed door 6 in such 'manner that when the door is opened the valve 14 will be opened for the supply of steam to the pipes 11 13* and 26, while the valve 34 will be closed to cut off the discharge of steam from the diaphragm casing and pipe 33, and on the other hand, when the door is closed the valve 14 will be closed to cut off the supply of steam to the pipes 11, 13 and 26 while the valve 34 will be opened for the discharge of the steam previously admitted to the diaphragm casing and to permit the diaphragm to return to its normal position. By this means when the fuel door is opened by the fireman for the purpose of replenishing the grate with fuel, the chains 18 and 27 will be respectively drawn upon to depress and elevate the respective ends of the lever 22 to which they are attached, whereby valves 14 and 34 will be respectively opened and closed to admit steam to the pipes 11, 13' and 26 for the discharge-of blasts of steam and air into the fire box and for simultaneously setting the controlling mechanism into action. When the fuel feed door is again closed, the chains will be slackened or untensioned, but the valves 14 and 34 will remain respectively open and closed until the lever 22 'isactuated by the diaphragm. The regulating valve 32 having been previouslyset to allow a determined feed ofthe steam to the diaphragm casing, it will be understood that steam will continue to be supplied to the jet nozzles for the purpose of oxygenating the gases and products of combustion for consumption until the pressure in the casing" 25 reaches a predetermined degree, at which time the diaphragm 24 will be deflected upward and will elevate the depressed long arm of the lever and depress the short arm thereof to points above and below the normal level of said arms, thus closing the valve 14 to cut off the supply' of steam and opening the valve 34 to permit escape of the steam from'the casing 25, whereupon the diaphragm will descend and the weight 30 will return the lever to, normal position. By proper regulation of the valve 32, the time period or interval between the initial admission of jets of steam and air to the fire box and the operation of the diaphragm 24 to close the valve 14 may be varied, according to conditions and the character of fuel employed, so that the uneonsumed gases and products rising from the bed of fuel after a fresh charge has been supplied may be entirely or practically entirely consumed before the apparatus is thrown out of operation. The automatic mechanism described avoids the necessity of manual attention to the parts of the apparatus, and at the same time efi'ects a cutting off of the supply of steam at the proper time to secure an economy of steam consumption.

I claim The combination with a furnace, of thimbles extending through the furnace wall and communicating with the fire box, a manifold arranged on the exterior of the furnace and provided with diametrically opposed series of air inlet nozzles and discharge nozzles, the latter extending into the said thimbles,

a steam supply pipe arranged within the manifold and provided with steam injection nozzles projectin into the discharge nozzles of the manifold, means for controlling the supply of steam to said pipe, and an air supply pipe extending parallel with said manifold and provided with outlets telescopically engaging the air inlet nozzles of the manifold.

In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM KELLYa Witnesses J. J. LANIGAN, Enw. COLBERT.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0." 

